Radleys Reactor-Ready Lab Reactor - Temperature Range; Self-Sealing Couplings

51
Important information
→ If the internal temperature is not being monitored (for instance, if the vessel is empty) then great
care should be taken to cool or heat the vessel in a controlled way to prevent thermal shock. This
may be achieved by either tempering in stages or by use of a ramp function.
Warning!
 When heating/cooling your jacketed vessel, the difference between the temperature of the
vessel contents and the jacket temperature (ΔT), should not exceed 50K to avoid the vessel
breaking.
Temperature range
Standard jacketed vessels with the Radleys V4 zero dead space stopcock (see page 52) are suitable for
use from -70°C to +230°C.
Important information
→ At temperatures below -50°C, there may be some weeping from the stopcock. Please see
Minimising weeping at low temperatures on page 53 for advice on techniques to minimise this.
Self-sealing couplings
The use of self-sealing couplings is not recommended on any connections or hoses. The internal shape
of the sealing mechanism causes a restriction in the flow and therefore affects the performance of the
thermoregulator.
The same is true of in-line valves, and care should be taken to prevent the possibility of pressurising the
jacket in this way (for instance by the use of lockable valves).
Warning!
 The use of self-sealing couplings can also lead to vessel breakage due to pressurising the jacket,
either because the jacket becomes isolated from atmospheric pressure, or the vessel outlet is
shut whilst the circulator is running.